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Journal Article The Agricultural Systems of the World. An evolutionary approach Get access The Agricultural Systems of the World. An evolutionary approach. By D. B. GRIGG. (London: Cambridge University Press, 1974. Pp. ix + 358. £6-60 hardback, £2-75 paperback.) Edith H. Whetham Edith H. Whetham Cambridge Search for other works by this author on: Oxford Academic Google Scholar The Economic Journal, Volume 85, Issue 338, 1 June 1975, Pages 452–453, https://doi.org/10.2307/2231034 Published: 01 June 1975
Whetham et al. (Sun,) studied this question.